When started, each drug will be given with the corresponding loading dose of 600 mg for clopidogrel and then continued at 75 mg/day, 180 mg for ticagrelor and then continued at 90 mg b.i.d. and 60 mg for prasugrel and then continued at 10 mg/day (5 mg/day for patients ≥75 years or weighing ≤ 60 kg).